Home / 12,543.18-17,321.31-8,074.70

Finding the Fourth Proportional to 12,543.18, 17,321.31 and 8,074.70

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Solution

The fourth proportional to 12,543.18, 17,321.31 and 8,074.70 is: 11,150.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.18 : 17,321.31 = 8,074.70 : x
  2. Step 2: Convert to fraction form
    12,543.18/17,321.31 = 8,074.70/x
  3. Step 3: Cross multiply
    12,543.18x = 17,321.31 × 8,074.70
  4. Step 4: Simplify right side
    12,543.18x = 139,864,295.25
  5. Step 5: Solve for x
    x = 139,864,295.25/12,543.18
  6. Step 6: Final answer
    x = 11,150.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.